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Reports instantiations of <code>java.util.SimpleDateFormat</code> or <code>java.time.format.DateTimeFormatter</code>
that do not specify a <code>java.util.Locale</code>.
These calls will use the platform default locale, which depends on the OS settings.
This can lead to surprising behaviour when the code is run on a different platform or the OS settings are changed.
<p><code>Example:</code></p>
<pre><code>
  new SimpleDateFormat("yyyy");
  DateTimeFormatter.ofPattern("d/M/y");
</code></pre>
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